Internal-combustion engine.



A. J. SEAMAN.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED DEC. 1. I9I 2.

1,165,290. Patented Dec. 21, 1915.

2 SHEETS-SHEET I.

Wines sea Jfweniar w zy A. J. SEAMAN. INTERNAL COMBUSTION ENGINE.

. APPLICATION FILED DEC. 7,1912.

. Patented Dec. 21, 1915.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

ALBERT J. SEAMAN, OF BOSTON, MASSACHUSETTS, ASSIGNOR, BY DIRECT AND MESNE I ASSIGNMENTS, TO SEAMAN ENGINE COMPANY, OF BOSTON, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent. Patented Dec. 21, 1915.

Application filed December 7, 1912. Serial No. 735,378.

To all whom it may concern:

Be it known that I, ALBERT J. SEAMAN, a

- citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented an Improve ment in Internal-Combustion Engines, of which the following is a specification.

This invention relates to improvements in valve-mechanisms for internal combustion engines for controlling both the inlet and exhaust.

The object of the invention is to provid a valve-mechanism having a pair of rotary hollow frusto-conical valve-bodies, one for the inlet and the other for exhaust, which are slidably connected and yieldingly held against their seats by a spring, so that they may be rotated in unison and will not bind against their seats, and to make said frustoconical valve-bodies hollow and provide each valve-body with a port to register with cor-' responding ports in the cylinder as the valve-bodies rotate, and also to make them with open ends of larger area than the ports, thereby to provide an unrestricted passage through them; also to arrange said frusto-conical valve-bodies in alinement and to provide for driving them by means arranged between them, thereby to equalize the driving strain, and prevent their gyratory movements.

In the accompanying drawing, Figure 1 is a central vertical section of the valve-mechanism. Fig. 2 is a horizontal section of the same, taken on the dotted line 22, of Fig. 1, Fig. 3 is an end elevation, and Fig. 4 is a vertical section taken on the dotted line 44, Fig. 1.

As here shown for the purpose of illustrating one embodiment of my invention 10 represents a cylinder having a valve-casing 1.2, arranged at or mounted upon its upper end. The casing 12 isprovided with a pair of alined frustoeconical recesses 14, 15, arranged with their smaller ends adjacent each other. Rotatably mounted in said recesses are a pair of hollow frusto-conical valve-bodies 16 and 18. The hollow valvebody 18 is open at its outer end and is provided at its inner end with a wall 20 having a polygonal boss 21, in the present instance shown as square, projecting outwardly therefrom. The hollow valve-body 16 is open at its outer end and is provided at its inner end with a wall 22 and a polygonal boss 23, having a square hole 24 extending therethrough, within which the boss 21 slidably fits. A bolt or pin 26 extends through the boss 21, and is provided with an enlarged head 28, which bears against the inner face of the end wall of the valve-body 16 A coiled spring 30 embraces the pin 26, said spring bearing at'one end against the lnner face of the end wall 20 of the valvebody 18 and at the other end against an adustable nut 32, threaded upon said pin, said nut being preferably provided with a flange 34 for engaging said spring. By this construction the "alve-bodies are held yieldlngly upon or against their seats and are maintained in slidable relation with respect to one another, yet are connected together so that they will be rotated in unison.

The valve-body 16 is provided with a port 36 in its side wall which is adapted to be brought into register with a port 38, which communicates with the top of the cylinder 10. This port, in the present instance, may be the exhaust port. The valve-body 18 is also provided with a similar port, which is adapted .to be brought into register with a port 40, which also communicates with the top of the cylinder 10, and may serve as the inlet port. The valve-body 18 may communicate with any suitable supply of combustible to control the admission of the latter to the cylinder, and the valve-body 16 may communicate with the atmosphere.

The valve-casing 12 and the cylinder 10 may be provided with water jackets 42 and 44, respectively. In order to rotate the valve-bodies in unison a spiral gear 46 is mounted upon the boss 23, on the end wall 22 of the valve-body 16, said gear having a square hole to fit the boss. The gear 46 is held against endwise motion by the opposing walls 47, 48, of the valve-casing. The spiral gear 46 meshes with a spiral-pinion 50, mounted on a driving-shaft 52, which may be connected with the engine-shaft in any suitable manner, not shown, so as to be rotated in timed relation with the movements of the piston within the cylinder 10. By having the driving-connection for the valve located between the valve-bodies and connected therewith, said val ve-bodies are not subjected to a gyratory-actlon, such as would be produced if the driving-means is arranged at one end, thus equalizing the driving-strain.

tated, said bodies being arranged for relative axial movement but connected against relative rotation, self-adjusting means arranged for connection with both valve 1 bodies for holding them in engagement with their seats and permitting axial movements thereof. to compensate for expansion and contraction, and a driving vconnection arranged betweensaid valve-bodies for rotating them, substantially as described.

2; A valve-mechanism for internal com-- bustion engines, comprising a casing having a pair of. frusto-conical valve seats, arranged in alinement, with their smaller ends adj oining, and having ports communicating with the engine-cylinder, a pair of hollow frustoconical valve-bodies arranged in alinement and fitting said seats, said valve-bodies being open at one end and having ports adapted to move into register with the ports in the casing when rotated, said bodies being arranged for relative axial movement but connected against relative rotation, self-adjusting means arranged for engagement with the inner ends of bothvalve bodies for holding them in engagement with their,

seats, and permitting axial movements thereof to. compensate for expansion and contraction, and a driving connection arranged between said valve-bodies for rotating them, substantially as described. 3. A valve-mechanism for internal combustion engines comprising a casing having a pair of alined frusto-conical valve seats with ports communicating with the engine cylinder, a pair of alined hollow frustoconical valve bodies having ports, said bodies being arranged for relative axial movement but connected against relative rotation, means for slidably. connecting said bodies together and for yieldingly pressing them against their-seats, and'means for rotating said valve bodies, substantiallyas described,

4. A valve-mechanism for internal combustion engines, comprising a pair of alined frusto-conical valve-seats, a pair of hollow frusto-conical valve-bodies adapted to fit said seats, said bodies being slidably connected together at their inner' ends, means for yield ingly holding said bodies against their seats, a gear connected to one of said bodies between the opposing inner ends of said bodies, and means for rotating said gear,

said bodies together and pressing them yieldingly against their seats, and means to rotate said valve-bodies, substantally as described. I

6. A valve-mechanism for internal combustion engines, comprising a casing having ports and a pair of alined frusto-conical valve-seats, a pair of frusto-conical valve-q bodies open at their outer ends and closed at their nner ends, slidable' axially with respect to, one another but connected to rotate I together, means for yieldingly connecting said valve-bodies together and pressing them yieldingly against their seats, a gear connected to the inner end of one of said valvebodies, and means for rotating saidgear, substantially as described.

7. A valve-mechanism for internal combustion engines comprising a casing having a pair of alined valve seats with ports communicating with the engine cylinder, a pair of alined hollow frusto conical bodies fitting said seats open at one end and having ports to move into register with the ports in the casing when rotated, means including a spring to connect said bodies together permitting relative axial movement and preventing relative rotation whereby said bodies are yieldmgly held against their seats and caused to rotate in unison, and means for rotating said bodies, substanti ally as described.

8. A valve-mechanism for internal combustion engines, comprising a casing having a pair of alined valve seats with ports communicating with theengine cylinder, a pair of alined hollowfrusto-conical bodies fitting said seats open at one end and having ports to move into register with the ports in the casing when rotated, one of said bodies having a polygonal boss at its inner end and the other having a polygonal boss at its inner end with a polygonal hole to receive the aforesaid boss, yielding means connecting said bosses together, a gear arranged on the polygonal boss having a hole, and means to engage and rotate said gear, substantially as described.

9. A valve mechanism for internal combustion engines, comprising a casing formed with conical valve seats, valves fitting said seats, the adjacent ends of the valves having complementary formations to permit relative axial movement of the valves while preventing relative rotation thereof, and means cooperating with both valves for permitting a limited axial play of the valves, said means serving to hold the valves in engagement with their seats. A

10. A valve mechanism for internal combustion engines, comprising a casing formed with conical valve seats, valves fitting said seats, said valves being formed at their meeting ends for a sliding interlocking fit to insure similar rotative movement of the valves, and means for securing said valves name to this specification, in the presence of 15 two subscribing witnesses.

ALBERT J. SEAMAN; Witnesses:

B. J. Noms, H. B. DAVIS. 

